In their youth, such people must have had a superfluity of muscular and vital energy,--powers which, unlike those of the mind, cannot maintain their full degree of vigor very long; and in later years they either have no mental powers at all, or cannot develop any for want of employment which would bring them into play; so that they are in a wretched plight. _Will_, however, they still possess, for this is the only power that is inexhaustible; and they try to stimulate their will by passionate excitement, such as games of chance for high stakes--undoubtedly a most degrading form of vice. And one may say generally that if a man finds himself with nothing to do, he is sure to choose some amusement suited to the kind of power in which he excels,--bowls, it may be, or chess; hunting or painting; horse-racing or music; cards, or poetry, heraldry, philosophy, or some other dilettante interest. We might classify these interests methodically, by reducing them to expressions of the three fundamental powers, the factors, that is to say, which go to make up the physiological constitution of man; and further, by considering these powers by themselves, and apart from any of the definite aims which they may subserve, and simply as affording three sources of possible pleasure, out of which every man will choose what suits him, according as he excels in one direction or another. First of all come the pleasures of _vital energy_, of food, drink, digestion, rest and sleep; and there are parts of the world where it can be said that these are characteristic and national pleasures. Secondly, there are the pleasures of _muscular energy_, such as walking, running, wrestling, dancing, fencing, riding and similar athletic pursuits, which sometimes take the form of sport, and sometimes of a military life and real warfare. Thirdly, there are the pleasures of sensibility, such as observation, thought, feeling, or a taste for poetry or culture, music, learning, reading, meditation, invention, philosophy and the like. As regards the value, relative worth and duration of each of these kinds of pleasure, a great deal might be said, which, however, I leave the reader to supply. But every one will see that the nobler the power which is brought into play, the greater will be the pleasure which it gives; for pleasure always involves the use of one's own powers, and happiness consists in a frequent repetition of pleasure. No one will deny that in this respect the pleasures of sensibility occupy a higher place than either of the other two fundamental kinds; which exist in an equal, nay, in a greater degree in brutes; it is this preponderating amount of sensibility which distinguishes man from other animals. Now, our mental powers are forms of sensibility, and therefore a preponderating amount of it makes us capable of that kind of pleasure which has to do with mind, so-called intellectual pleasure; and the more sensibility predominates, the greater the pleasure will be.[1]